Consider the following situations: a. A car is moving along a straight road at a

Question

Consider the following situations: a. A car is moving along a straight road at a constant speed. b. A car is moving along a straight road while slowing down c. A car is moving along a straight road while speeding up. d. A hockey puck slides along a smooth (ie, frictionless) icy surface. e. A hockey puck slides along a rough concrete surface. f. A cockroach is speeding up from rest. g. A rock is thrown horizontally, air resistance is negligible. h. A rock is thrown horizontally; air resistance is substantial. i. A rock is dropped vertically; air resistance is negligible j. A rock is dropped vertically; air resistance is substantial. Part D Which of these situations describe the motion shown in the motion diagram at point A? Type the letters corresponding to all the right answers. Do not use commas. For instance, if you think that only situations c and d are correct, type cd ad Previous Answers Correct Part E Which of these situations describe the motion shown in the motion diagram at point B? Type the letters corresponding to all the right answers. Do not use commas. For instance, if you think that only situations c and d are correct, type cd. be Previous Answers All attempts used; correct answer displayed

Explanation / Answer

Look at the motion diagram at point C, we can observe that the speed is increasing, however, we must notice that the object has been thrown and the air resistance is almost negligible, had there been air resistance, the length of the arrow would be decreasing.

Therefore, the correct option for part F is

Option g - A rock is thrown horizontally and the air resistance is negligible.

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